import pygame import math import random # --- 初始化 --- pygame.init() WIDTH, HEIGHT = 800, 600 screen = pygame.display.set_mode((WIDTH, HEIGHT)) pygame.display.set_caption("Pygame 3D赛车 - Retro OutRun Style") clock = pygame.time.Clock() # 颜色 SKY_COLOR = (100, 150, 255) GRASS_COLOR = (50, 150, 50) ROAD_COLOR = (80, 80, 80) RUMBLE_COLOR = (200, 50, 50) LANE_COLOR = (255, 255, 255) CAR_COLOR = (200, 30, 30) FONT = pygame.font.SysFont("arial", 30) # --- 3D 投影参数 --- CAMERA_HEIGHT = 1000 CAMERA_DEPTH = 1 / math.tan((80 / 2) * math.pi / 180) # 80度FOV ROAD_WIDTH = 2000 SEG_LENGTH = 200 DRAW_DIST = 150 # --- 赛道生成 --- def build_road(): road = [] # 直道 for _ in range(50): road.append(0) # 左弯 for i in range(50): road.append(-math.sin(i / 50 * math.pi) * 4) # 直道 for _ in range(50): road.append(0) # 右弯 for i in range(50): road.append(math.sin(i / 50 * math.pi) * 6) # 连续S弯 for i in range(100): road.append(math.sin(i / 20 * math.pi) * 3) return road class Car: def __init__(self): self.x = 0 # -1 到 1，0是中心 self.z = 0 # 前进距离 self.speed = 0 self.max_speed = SEG_LENGTH * 60 self.accel = self.max_speed / 120 self.brake = -self.max_speed / 60 self.decel = -self.max_speed / 300 self.off_road_decel = -self.max_speed / 60 self.steer_speed = 3.0 def update(self, keys, dt, road): # 输入 if keys[pygame.K_UP]: self.speed += self.accel * dt elif keys[pygame.K_DOWN]: self.speed += self.brake * dt else: self.speed += self.decel * dt # 边界限制 self.speed = max(0, min(self.speed, self.max_speed)) # 转向 steer = 0 if keys[pygame.K_LEFT]: steer = -self.steer_speed if keys[pygame.K_RIGHT]: steer = self.steer_speed # 速度越快转向越明显，但也要考虑离心力 self.x += steer * (self.speed / self.max_speed) * dt # 弯道离心力 seg_idx = int(self.z / SEG_LENGTH) % len(road) curve = road[seg_idx] self.x -= curve * (self.speed / self.max_speed) * 0.01 * dt # 路边惩罚 if abs(self.x) > 1.0: self.speed += self.off_road_decel * dt self.x = max(-2, min(2, self.x)) # 防止飞出太远 # 前进 self.z += self.speed * dt # --- 3D 投影辅助 --- def project(p, camera_x, camera_y, camera_z, camera_depth, width, height, road_width): # 简单透视投影 trans_x = p[0] - camera_x trans_y = p[1] - camera_y trans_z = p[2] - camera_z if trans_z <= 0: return None scale = camera_depth / trans_z screen_x = width / 2 + scale * trans_x * width / 2 screen_y = height / 2 - scale * trans_y * height / 2 screen_w = scale * road_width * width / 2 return (screen_x, screen_y, screen_w, scale) # --- 主程序 --- def main(): car = Car() road = build_road() running = True while running: dt = clock.tick(60) / 1000.0 # 秒 for event in pygame.event.get(): if event.type == pygame.QUIT: running = False car.update(pygame.key.get_pressed(), dt, road) # --- 绘图 --- screen.fill(SKY_COLOR) # 画草地（下半屏） pygame.draw.rect(screen, GRASS_COLOR, (0, HEIGHT//2, WIDTH, HEIGHT//2)) base_seg = int(car.z / SEG_LENGTH) base_percent = (car.z % SEG_LENGTH) / SEG_LENGTH # 累积曲线偏移 x = 0 dx = 0 # 从远到近画 segments = [] for n in range(DRAW_DIST): idx = (base_seg + n) % len(road) curve = road[idx] # 世界坐标 world_z = (n - base_percent) * SEG_LENGTH if world_z <= 0: continue # 透视投影 scale = CAMERA_DEPTH / (world_z / CAMERA_HEIGHT) screen_y = HEIGHT / 2 + scale * CAMERA_HEIGHT * HEIGHT / 2 screen_w = scale * ROAD_WIDTH * WIDTH / 2 # 累积弯道偏移 x += dx dx += curve screen_x = WIDTH / 2 + (x - car.x * ROAD_WIDTH / 2) * scale * WIDTH / 2 segments.append({ 'y': screen_y, 'w': screen_w, 'x': screen_x, 'idx': idx, 'n': n }) # 从后往前画（画家算法） for i in range(len(segments) - 1, 0, -1): s1 = segments[i] s2 = segments[i-1] if s1['y'] <= s2['y']: continue # 被遮挡 # 交替颜色 alt = (s1['idx'] // 3) % 2 road_col = ROAD_COLOR if alt else (70, 70, 70) rumble_col = RUMBLE_COLOR if alt else (255, 255, 255) grass_col = GRASS_COLOR if alt else (40, 130, 40) # 画草地 pygame.draw.rect(screen, grass_col, (0, int(s2['y']), WIDTH, int(s1['y'] - s2['y']))) # 画路肩 pygame.draw.polygon(screen, rumble_col, [ (s2['x'] - s2['w'] * 1.1, s2['y']), (s2['x'] + s2['w'] * 1.1, s2['y']), (s1['x'] + s1['w'] * 1.1, s1['y']), (s1['x'] - s1['w'] * 1.1, s1['y']) ]) # 画路面 pygame.draw.polygon(screen, road_col, [ (s2['x'] - s2['w'], s2['y']), (s2['x'] + s2['w'], s2['y']), (s1['x'] + s1['w'], s1['y']), (s1['x'] - s1['w'], s1['y']) ]) # 画中线 if alt: lw1 = max(2, s1['w'] * 0.02) lw2 = max(2, s2['w'] * 0.02) pygame.draw.polygon(screen, LANE_COLOR, [ (s2['x'] - lw2, s2['y']), (s2['x'] + lw2, s2['y']), (s1['x'] + lw1, s1['y']), (s1['x'] - lw1, s1['y']) ]) # 画玩家车 steer_angle = 0 if pygame.key.get_pressed()[pygame.K_LEFT]: steer_angle = -15 if pygame.key.get_pressed()[pygame.K_RIGHT]: steer_angle = 15 car_rect = pygame.Rect(WIDTH//2 - 30, HEIGHT - 120, 60, 80) pygame.draw.rect(screen, CAR_COLOR, car_rect) # 车窗 pygame.draw.rect(screen, (100, 150, 255), (WIDTH//2 - 20, HEIGHT - 110, 40, 30)) # 轮胎 pygame.draw.rect(screen, (30, 30, 30), (WIDTH//2 - 35, HEIGHT - 100, 10, 40)) pygame.draw.rect(screen, (30, 30, 30), (WIDTH//2 + 25, HEIGHT - 100, 10, 40)) # UI speed_kmh = int(car.speed / car.max_speed * 300) spd_txt = FONT.render(f"Speed: {speed_kmh} km/h", True, (255, 255, 255)) screen.blit(spd_txt, (20, 20)) pygame.display.flip() pygame.quit() if __name__ == "__main__": main()